CN211393501U - Novel double-scanning light curtain - Google Patents
Novel double-scanning light curtain Download PDFInfo
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- CN211393501U CN211393501U CN201922019230.3U CN201922019230U CN211393501U CN 211393501 U CN211393501 U CN 211393501U CN 201922019230 U CN201922019230 U CN 201922019230U CN 211393501 U CN211393501 U CN 211393501U
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Abstract
The utility model relates to an elevator light curtain field, more specifically the novel double scanning light curtain that says so, including slide rail, slider I, motor, slider II, track, rotation wheel, light curtain and sedan-chair door, the light curtain can slide from top to bottom in the slide rail, the quantity of sedan-chair door be two, and the motor of installation in every sedan-chair door rotates in step on. The blind area of the light curtain can be better detected.
Description
Technical Field
The utility model relates to an elevator light curtain field, more specifically the novel double scanning light curtain that says so.
Background
According to statistics, more than 80% of the injury accidents of the elevator to passengers are caused by the elevator door. A significant portion of elevator failures are also caused by elevator door system failures. From the birth of the vertical lifting elevator, how to avoid the potential threat of the elevator door to passengers and protect the safe operation of the elevator door system is always an important subject for manufacturing and maintaining the elevator. The standards of elevators in all countries have mandatory regulations on the safety protection of elevator doors. Engineers have designed elevator door protection systems that take various forms. Since the nineties of the last century, infrared light curtain elevator door protection systems have become widely adopted in the elevator industry.
The infrared light curtain elevator door protection system consists of an infrared transmitter and an infrared receiver which are respectively arranged at two sides of an elevator door. The infrared emitter can emit infrared detection beams in turn, and the infrared receiver can cyclically detect the beams in turn, so that tens to hundreds of infrared protection light curtains are formed on the plane of the elevator car door. When passengers or objects enter or exit the plane of the elevator car door and block any beam in the infrared light curtain scanning process, the light curtain control system can detect and output signals to the elevator car door system to enable the elevator door which is being closed to be reversely opened, so that the purpose of protecting the passengers is achieved.
The national standard for elevator door protection regulations:
1. provisions of national standards for elevator door protection
GB7588-2003 clauses 8.7.2.1.1.3 and 7.5.2.1.1.3, there are corresponding provisions for door protection: "when a passenger is struck by a door leaf or will be struck when passing through an entrance during the closing of the car door, a protection device should automatically cause the door to reopen. The effect of this protection can be eliminated during the last 50mm of travel of each active door leaf. For a system which deactivates the protection means after a predetermined time to resist the continued obstruction of the door closing, the kinetic energy prescribed by 8.7.2.1.1.2 should not be greater than 10J when the door leaf moves in the event of a protection failure.
GB7588-2003 is technically equivalent to EN 81-1998. The national standard clearly indicates that door systems generally have door protection in car door systems, but no clear provisions are made for the type, position and protection mode of the door protection, so that some confusion can be caused to designers in the actual design and use process, and meanwhile, I think that the elimination of the door protection in the final 50mm stroke can cause certain safety hazards.
Contrast differences between infrared light curtains and other elevator door protection:
the infrared light curtain elevator door protection system is non-contact protection, does not impact passengers or objects entering and exiting an elevator, not only ensures that the passenger elevator is more friendly to the passengers, but also protects the elevator door from being damaged due to long-term collision. The infrared light curtain elevator door protection system is a closed-loop protection form, and a detection signal is returned to a controller from a control system to an infrared transmitter to an infrared receiver to form a protection loop. The infrared light curtain can also give an alarm if the loop itself is interrupted, for example if the infrared transmitting tube or the receiving tube is damaged. Therefore, the infrared light curtain elevator door protection system is a failure safety protection device.
Conventional elevator door protection devices use mechanical touch panels, i.e., movable metal strips mounted on both sides of the elevator car door. When the mechanical touch plate is impacted to move towards two sides, the micro switch behind the movable metal strip is triggered to output a door opening signal.
The emitter and receiver of the infrared light curtain elevator door protection system are composed of an infrared emitter and an infrared receiver. Several pairs of infrared transmitting tubes and infrared receiving tubes are arranged in the infrared transmitter and infrared receiver respectively.
The emitter of the infrared light curtain emits single beam infrared rays by a certain emitting tube under the control of a program, and simultaneously detects a receiving signal of a corresponding receiving tube, so that a detection loop is formed.
The mechanical touch plate is an open-loop protection system, and the system cannot respond to faults in the system, such as failure of a microswitch; the mechanical touch plate reacts by means of impact, so that the mechanical touch plate is not only damaged to passengers or objects, but also easy to damage after being used for a long time; on a freight elevator, the impact of an object on the mechanical contact plate inevitably also causes damage to the elevator door.
When single-beam infrared is transmitted, the control system only receives the signal of one infrared receiving tube corresponding to the infrared transmitting tube, and then transmits and receives the next pair of infrared transmitting tube and infrared receiving tube, thus forming an infrared protection light curtain composed of parallel infrared beams. The number of pairs of infrared transmitting tubes and infrared receiving tubes forms the number of parallel light beams. Between the parallel beams, there is a "viewing" blind zone.
The single beam infrared emission is similar to visible light, is not a straight line like laser, but is conical divergent, so that several adjacent receiving tubes above and below in a row of receiving tubes can be irradiated. When the control system instructs a certain infrared transmitting tube to transmit, the control system can receive signals of the receiving tube which is opposite to the transmitting tube, and can also receive signals of the upper and lower adjacent receiving tubes one by one in sequence. Each time a receiver tube signal is received, as is the case when observing that "line". Scanning all these "lines of sight" once forms a cross beam. With the crossed light beams, fewer infrared transmitting tubes and infrared receiving tubes can be used to form a denser infrared protection light curtain with almost no 'observation' blind area.
The elevator safety light curtain does not need a controller during actual application, only needs a transmitter and a receiver, is connected through an aviation plug socket or a cable conductor during use, and can be directly externally connected with a relay or various computer digital interfaces in output.
In a test principle structure for detecting the entrance of an object (such as a hand) by using a safety light curtain, a plurality of infrared transmitting tubes are arranged on one side of the light curtain at equal intervals, the other side of the light curtain is correspondingly provided with a same number of infrared receiving tubes which are arranged in the same way, and each infrared transmitting tube is correspondingly provided with a corresponding infrared receiving tube and is arranged on the same straight line. When no barrier exists between the infrared transmitting tube and the infrared receiving tube on the same straight line, the modulation signal (optical signal) sent by the infrared transmitting tube can smoothly reach the infrared receiving tube. After the infrared receiving tube receives the modulation signal, the corresponding internal circuit outputs low level, and under the condition of an obstacle, the modulation signal (optical signal) sent by the infrared transmitting tube can not smoothly reach the infrared receiving tube, at this moment, the infrared receiving tube can not receive the modulation signal, and the output of the corresponding internal circuit is high level. When no object passes through the light curtain, the modulated signals (light signals) sent by all the infrared transmitting tubes can smoothly reach the corresponding infrared receiving tube on the other side, so that all the internal circuits output low level. Thus, the presence or absence of an object can be detected by analyzing the state of the internal circuit.
When a person who takes the elevator pulls a dog or a fine object enters the elevator car, and the dog or the object does not enter the elevator car and is still outside the elevator car and the elevator is closed, infrared rays of the light curtain are transmitted to the receiver end in parallel or in a cross mode, and the infrared rays are transmitted by the light curtain to detect whether foreign matters exist or not when the elevator is closed, and the foreign matters cannot be detected by the light curtain due to the fact that the rope is too fine and can be located in a gap part of two rays. An accident occurs.
This technical scheme is than prior art's advantage: the blind area of the light curtain can be better detected.
Disclosure of Invention
The utility model discloses the main technical problem who solves provides a novel two scanning light curtains, can detect the blind area of light curtain better.
In order to solve the technical problem, the utility model relates to an elevator light curtain field, more specifically the novel double scanning light curtain that says so, including slide rail, slider I, motor, slider II, track, rotation wheel, light curtain and sedan-chair door, can detect the blind area of light curtain better.
The light curtain can slide up and down in the slide rail, the number of the car doors is two, and a motor arranged in each car door rotates synchronously.
As the further optimization of this technical scheme, the utility model relates to a novel two scanning light curtains slider I, motor, slider II, track and running wheel form slider-crank mechanism.
As the further optimization of this technical scheme, the utility model relates to a novel two scanning light curtains slider I be located the eccentric department of rotating the wheel.
The utility model relates to a novel two scanning light curtains's beneficial effect do:
the utility model relates to a novel two scanning light curtains, the blind area that can detect the light curtain better.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a diagram of a motion state of the novel dual-scanning light curtain of the present invention 1.
Fig. 2 is a diagram 2 showing a motion state of the dual-scanning light curtain of the present invention.
Fig. 3 is a diagram of a motion state of the dual-scanning light curtain of the present invention.
In the figure: a slide rail 1; a sliding block I2; a motor 3; a sliding block II 4; a rail 5; a rotating wheel 6; a light curtain 7; and a car door 8.
Detailed Description
The specific implementation mode is as follows:
the present embodiment is described below with reference to fig. 1 to 3, and the present invention relates to the field of elevator light curtains, and more specifically to a novel double-scanning light curtain, which comprises a slide rail 1, a slider i 2, a motor 3, a slider ii 4, a track 5, a rotating wheel 6, a light curtain 7 and a car door 8, and can better detect the blind area of the light curtain.
The light curtain 7 can slide up and down in the slide rail 1, the number of the car doors 8 is two, and the motor 3 arranged in each car door 8 rotates synchronously.
Set up on the elevator sedan-chair door and rotate the motor, set up on the motor and rotate the wheel, rotate and take turns to and have slider I2, slider I2 is in the track, and slider I2 rotates slider II 4 in fixed orbit's one end along with rotating the wheel, and the slider on the slider II 4 can rotate along with the direction of motion of guide rail. The other end of the guide rail is fixed on the light curtain. The light curtain is provided with a sliding rail, a motor arranged on a car door of the light curtain in a reciprocating motion mode is controlled by a door closing signal of the elevator, when a main board of the elevator reaches a registered landing, the elevator performs a door opening action to enable passengers in the car to enter and exit the elevator, and when the elevator reaches the door closing time, the main board outputs a door closing signal to a frequency converter of the door machine and simultaneously gives a signal for rotating the motor to work. The whole process of the in-process of closing the door keeps the motor to rotate, the motor on the left car door keeps corotation when closing the door, the motor on the right car door keeps the reversal, so that the light curtain on the car doors on two sides keeps the up-and-down reciprocating movement of relative parallel and level, the original fixed infrared rays increase the measuring range, and the detection of the blind area is realized in a wider range.
The motor drives the light curtain to actively monitor as shown in the schematic diagram 1, and the light curtain can reach the highest end of the car door.
The motor drives the schematic diagram 3 of the active monitoring of the light curtain, and the light curtain can reach the lowest end of the car door.
Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and the changes, modifications, additions or replacements made by those skilled in the art within the scope of the present invention also belong to the protection scope of the present invention.
Claims (2)
1. The utility model provides a novel two scanning light curtains, includes slide rail (1), slider I (2), motor (3), slider II (4), track (5), rotates wheel (6), light curtain (7) and sedan-chair door (8), its characterized in that: light curtain (7) can slide from top to bottom in slide rail (1), sedan-chair door (8) quantity be two, and motor (3) synchronous rotation of installation in every sedan-chair door (8), slider I (2), motor (3), slider II (4), track (5) and rolling wheel (6) form slider-crank mechanism.
2. A novel dual scanning light curtain as claimed in claim 1, wherein: the sliding block I (2) is positioned at the eccentric position of the rotating wheel (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922019230.3U CN211393501U (en) | 2019-11-21 | 2019-11-21 | Novel double-scanning light curtain |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922019230.3U CN211393501U (en) | 2019-11-21 | 2019-11-21 | Novel double-scanning light curtain |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211393501U true CN211393501U (en) | 2020-09-01 |
Family
ID=72208179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922019230.3U Expired - Fee Related CN211393501U (en) | 2019-11-21 | 2019-11-21 | Novel double-scanning light curtain |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211393501U (en) |
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2019
- 2019-11-21 CN CN201922019230.3U patent/CN211393501U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200901 |